import axios from 'axios'
import { Message } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'

// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 5000 // request timeout
})

// request interceptor
service.interceptors.request.use(
  config => {
    // do something before request is sent
    if (store.getters.token) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      
      config.headers['token'] = getToken()
    }
    return config
  },
  error => {
    // do something with request error
    //console.log(error) // for debug
    return Promise.reject(error)
  }
)

// response interceptor
service.interceptors.response.use(
  /**
   * If you want to get http information such as headers or status
   * Please return  response => response
  */

  /**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  response => {
    const res = response.data

    // if the custom code is not 20000, it is judged as an error.
    //模拟数据 正常返回状态时20000 真实数据 正常返回状态为0
      //return Promise.reject(new Error(res.msg || 'Error'))
      if(res.code==0){
        return res
      }else{
        // console.log("code:"+res.code+",msg:"+res.msg);
        // return res;
        if(res.code==1){
          Message({
            message: res.msg,
            type: 'error',
            duration: 3 * 1000
          })
        }else if(res.code==502){
          Message({
            message: "登录超时，请重新登录",
            type: 'error',
            duration: 3 * 1000
          })
          setTimeout(function() {
            store.dispatch('user/resetToken').then(() => {
              location.reload()
            })
          }, 2 * 1000)
          return
        }else if(res.code==401){ 
          Message({
            message: '没有权限',
            type: 'error',
            duration: 3 * 1000
          })
        }
        return Promise.reject(res)
      }
  },
  error => {
    var errorMsg='请求失败';
    if(error.response=='' || error.response==null || error.response=='undefined'){
      Message({
        message: errorMsg,
        type: 'error',
        duration: 3 * 1000
      })
      return error
    }
    if(error.response.status===404){
      errorMsg='找不到页面';
    }else if(error.response.status===500){
      errorMsg='服务器内部错误';
    } 
    errorMsg=errorMsg+",错误码："+error.response.status;
    Message({
      message: errorMsg,
      type: 'error',
      duration: 3 * 1000
    })
    return Promise.reject(error)
  }
)

export default service
